The Raptor does sound pretty interesting. One question I have is do you think it will feed ok from a staggered BDL style mag box? On their website I see mention of center feed detachable mags but cant find any information on feeding from a staggered BDL style magazine set up.

I have a 375 SOCOM in an AR platform and it shoots the Wilson Combat Speer 235 grain load under 1 MOA. This is the gun I carry when I go out Predator calling for bears. I haven't had any luck but I still try every year.